Optimization of contact normal force of the pluggable structure for relay socket
                                                     SUN De gang1,2, GUO Qin tao1, ZHAN Ming1
（1.College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2.Phoenix Contact AsiaPacific （Nanjing） Co., Ltd., Nanjing 211100, China）


Abstract: Aiming at the problem of the contact normal force optimization design between the pin of relay and the pluggable structure, the analyze parameter of design model was calibrated, the deviation of test method for contact force was analyzed, and the principle and process of setting reasonable contact force value were discussed, further step an optimization design method for the contact force was presented. The basic data of this method is from FEA simulation, and the GA （Genetic Algorithm） which based the RSM （Response Surface Methodology） was used for calculating the optimal value. Firstly, enough 3D models according to the value range of design variables were created, and the contact force of every model was simulated by FEA in Abaqus to get the data array which include the design variables and contact force. Secondly, based the data array, the RSM agent model was created and the optimal value of design variables was calculated by GA in Matlab. Lastly, the contact force value of optimized sample was tested and simulated. The results indicate that there is 8.60% deviation between the test and simulated value, and which are reasonable for engineer application. So this method is effective way for optimizing and testing the contact force of the pluggable structure.

Key words: pluggable structure; contact force; FEA; Matlab; optimization design